Color Blindness Test
Dr Rajeev Raut Eye Clinic Raut Eye Care

Read the article to know more about Color Blindness Test

Reviewed by
Dr. Aditya Raut M.B.B.S D.O.MS
Updated on Mar 08  •  2 mins read
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What is Color Blindness Test

Color Blindness Test is a type of vision test that is used to assess a person's ability to distinguish between different colors.The test involves the patient identifying different colored dots, lines, and shapes in a pattern.

Certain colors are more difficult to identify than others, and depending on the level of difficulty, the patient's color vision can be categorized as normal or color deficient.It is important to note that Color Blindness Test can only diagnose color deficiency, not color blindness.

Common types of color deficiency tests include the Ishihara Test, the Farnsworth-Munsell 100 Hue Test, and the Anomaloscope.Color Blindness Tests are used to diagnose color deficiency in children and adults alike.

The results of the Color Blindness Test can help doctors determine the best course of treatment for the patient, such as corrective lenses or color filters.


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When to do Color Blindness Test

  1. Color blindness test should be done in the following groups of people:
  2. -Children who are entering school, especially if they have had any eye surgery or eye injuries in the past
  3. -Adults who are applying for certain occupations that require good color vision, such as pilots, air traffic controllers, and other similar occupations
  4. -People who have a family history of color blindness
  5. -People who have diabetes, glaucoma, or other eye conditions that can affect color perception
  6. If a patient experiences any of the following they should consult a doctor urgently for color blindness test:
  7. -Symptoms of color blindness such as difficulty seeing colors or difficulty distinguishing between colors
  8. -Difficulty with reading, writing, or recognizing colors
  9. -Sudden vision changes, such as blurriness or seeing double
  10. -Loss of peripheral vision
  11. -Frequent headaches or eye strain

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Diseases in which Color Blindness Test is done

  1. Retinitis Pigmentosa: The Color Blindness Test will help to diagnose this degenerative eye disease by identifying any signs of color blindness, which can be an early sign of retinitis pigmentosa.
  2. Glaucoma: The Color Blindness Test can help diagnose glaucoma by determining if there is any color perception impairment. This can be an early sign of glaucoma.
  3. Macular Degeneration: The Color Blindness Test can help diagnose macular degeneration by detecting any reduction in color perception. This can be an early sign of macular degeneration.
  4. Cataracts: The Color Blindness Test can help diagnose cataracts by determining if there are any changes in color perception that may indicate the presence of a cataract.
  5. Diabetic Retinopathy: The Color Blindness Test can help diagnose diabetic retinopathy by detecting any changes in color perception that may indicate the presence of diabetic retinopathy.
  6. Age-Related Macular Degeneration: The Color Blindness Test can help diagnose age-related macular degeneration by detecting any changes in color perception that may indicate the presence of age-related macular degeneration.
  7. Uveitis: The Color Blindness Test can help diagnose uveitis by detecting any changes in color perception that may indicate the presence of uveitis.
  8. Corneal Dystrophy: The Color Blindness Test can help diagnose corneal dystrophy by detecting any changes in color perception that may indicate the presence of corneal dystrophy.
  9. Anterior Uveitis: The Color Blindness Test can help diagnose anterior uveitis by detecting any changes in color perception that may indicate the presence of anterior uveitis.
  10. Optic Neuritis: The Color Blindness Test can help diagnose optic neuritis by detecting any changes in color perception that may indicate the presence of optic neuritis.

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Symptoms that require Color Blindness Test

  1. Difficulty distinguishing between colors: This means that you have difficulty telling the difference between different colors. For example, you might have trouble distinguishing between red and green.
  2. Seeing only a limited range of colors: This means that you can only see certain colors, such as shades of gray or only certain shades of blue.
  3. Seeing only shades of gray: This means that you can only see different shades of gray, and cannot distinguish between other colors.
  4. Inability to identify colors: This means that you cannot identify any colors, and you cannot tell the difference between any colors.
  5. Seeing colors differently than others do: This means that you might see colors differently than other people do. For example, you might see a blue color as green, or a yellow color as orange.
  6. Struggling to read in dim light: This means that it is difficult for you to read in dim light, even if the reading material has large print.
  7. Seeing “halos” or “shadows” around objects: This means that when you look at an object, you might see a “halo” or “shadow” around it.
  8. Blurry vision: This means that your vision is not clear, and you cannot see objects clearly.
  9. Seeing “sparkles” of light: This means that when you look at an object, you might see little “sparkles” of light around it.
  10. Seeing spots or “floaters” in your vision: This means that you might see small spots or “floaters” in your vision. These spots or “floaters” may move around when you move your eyes.

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How Color Blindness Test is done

  1. The procedure of the color blindness test is relatively straightforward when using fully automated equipment. First, the patient will be asked to sit in front of the machine and place their chin on the chin rest. Next, the patient will be asked to look into the machine and focus on a central point. The machine will then present a series of colored circles or dots of varying size and brightness. The patient will be asked to identify the color they see in each circle or dot. Depending on the patient’s responses, the machine will be able to determine whether they suffer from color blindness or not. The procedure typically takes around 10 minutes and the results are usually available immediately.

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How long will Color Blindness Test take

  1. .
  2. The Color Blindness Test typically takes about 15 minutes to complete and the results of the test are usually available within a few hours. If the patient needs the report immediately, I can usually have it ready within a couple of minutes.

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Reviewed By

Dr.Aditya Raut, MBBS, DOMS, Cataract and Refractive Surgeon, with experience of over 3000 cataract surgeries.

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Article Reviewed by Dr. Aditya Raut M.B.B.S D.O.MS Cataract Lasik and refractive surgeon
Specialist in number reduction surgery, Refractive Lens exchange and ICL surgery.

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